Draft-regulator.



\A/I QESEES E PATENTED AUG. '7, 1906.

G. H. TARLETON.

DRAFT REGULATOR. APPLICATION FILED JULY 10, 1905.

UNITED STATES PATENT OFFICE.

GEORGE H. TARLETON, OF BOSTON, MASSACHUSETTS, ASSIGNOB OF ONE- HALF TOSMITH 8: ANTHONY COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OFMASSACHUSETTS.

DRAFT-REGULATOR.

Specification of Letters Patent.

Patented Aug. 7, 1906.

' T at whom, it may concern:

- stove, furnace, or heater in which the pipedamper which ordinarilycontrols such passage is caused to be moved simultaneously with a damperor slide employed for controlling a cold-air inlet or opening made inthe pipe forming said passage beyond the pipedamper. This cold-airdamper or slide has the same relative degree of motion as thepipe-damper, but acts with a reverse order of operation, for as thepipe-damper is closed or partially closed the cold-air damper or slideis opened or partially opened, and vice versa. The operation is thus inorder that the draft upon the fire-pot may be eliminated as much aspossible when the pipe-damper is closed and the cold-air damper or slideopen or proportionately eliminated depending upon the position of thedampers as respects their degree of opening or closure up to the pointwhere, with the pipe-damper open and the cold-air damper or slidetightly closed, connection with the outside air is entirely out off andas perfect a draft as possible secured.

The special object of my invention is to so arrange and connect thedampers that they may be made to properly operate together by as simplea means as possible.

Referring to the drawings, in which the means or device comprising myinvention can best be seen and understood, Figure 1 shows the device inside elevation. Fig. 2 shows a cross-section on the line 2 2 of Fig. 1,and Fig. 3 shows a cross-section on the line 3 3 of Fig. 1.

In the drawings, A represents a tubular pipe-section or thimble adaptedto be placed in the smoke or exit pipe of a stove, furnace, or heater,the disconnected ends of the pipe making connection with the thimble bybeing pressed onto its respective flanged ends a a in the usual manner.-Withinthe thimble A is arranged a damper B, turning ona spindle I),having bearings within the wall of the thimble. This damper, it is to benoted,is the common pipe-damper used as the ordinary means'for obtainingdraft regulation. Supplementing this pipe-damper I have shown somelittle distancebeyond it a cold-air inlet-or opening of, made throughthewallof the thim ble. This opening is of sector-like form cuttransversely through the thimble. The opening is not made through therounding wall of the thimble, but therounding wall of the thimble isbuilt out, as it were, presenting a flat side (L in which the opening orinlet is made. By so flattening the wall of the thimble it is bestprepared to receive theswinging damper or slide a*, which, having theform of asegment, is journaled to the flattened wall of the thimble atthe point a so as to normally hang down and cover the cold-air openingor inlet; but it may be turned or swung back so as to leave the inlet oropening partially or wholly open.

Of course the cold-air inlet, with its controlling damper or slide,supplements the action of the pipe-damper in regulating the draft, ashas heretofore been done. Of this mode of operation explanation hasalready been made. It is necessary, however, in order to secure the bestdraft regulation, for the pipe-dam er and the damper or slidecontrolling the co d-air inlet to coact uniformly. In other words, anyvariation in the degree of closure or opening of the one shouldsimultaneously be attended with a relatively corres onding but reversedegree of opening or c osure of the other. Not only this, but 1t is alsodesirable to employ such means or de vice that the dampers may becontrolled simply by drawing upon a single cord or chain, for thedampers are oftentimes automatically controlled by a thermostat, and itis a great advantage to have an arrangement permittin of the ampersbeing so operated or control ed. I have'accordingly extended the end ofthe spindle b carryin the pipedamper through the wall of the t imble andarranged upon the end projecting outside the thimble an arm B. This armextends perpendicularly to the spindle on the same line with thepipe-damper and is weighted or carries upon its end a weight B by whichit will be made to assume a vertical position, so that the pipe-damperwill be normally closed. Pivoted to this arm at a point 1) some littledistance away from where it makes its connection with the spindle is alink 0, which connects with the side of the cold-air damper or slide.The length of this connecting-link and the point a, Where it makesattachment with the cold-air damper or slide, is such that said cold-airdamper or slide will be held open when the pipe-damper is closed, orwhen the" pipe-damper is fully open or at any intermediate degree ofopening the cold-air damper or slide will, by means of theconnectinglink, have the same relative degree of closure. Moreover, itis to be noted that the arrangement of the parts is such that thisconnection may easily be made.

As was before explained, the normal position of the pi e-damper is toremain c osed, being so e d by the weighted arm, and in conse quence thecold-air damper or slide is held wide open. For holding the dampers inan intermediate position of opening or closure, as against the movingtendency of the weighted arm, I have ivoted to the flat side of thethimble a dog which is adapted to engage with the teeth a on the underedge of the cold-air damper. By the engagement of the dog with theseteeth a graduated holding or adjustment of the dampers is obtained. Upontripping the dog the parts resume their normal position, as aforesaid.For the purpose especially of enabling the dampers thus connected andarranged to be operated by a single cord or chain from athermostaticdevice I have provided the cold'air dam er with a circular drum or rimE. Fastene to this drum or rim at the point e is a cord or chain E,which is passed or turned around the drum so far that by simply drawingupon the chain by a short, light, and even pull, as may be obtained froma thermostatic device,

"course return to their normal position.

the dampers may be made to operate together. The weighted arm is ofcourse an essential factor in obtaining such an adjustment of thedampers, for its tendency to hold the dampers in a normal position issimply counteracted by the drawing stress of the chain, with the effectthat the dampers are turned and held at any oint of adjusted position,dependent upon t e distance of movement or amount of drawing stress.Upon releasing the drawing stress the parts of Besides this capabilityfor being operated by a cord or chain, the drum orcircularrim E offers avery convenient means for operating the dampers by hand-a manner inwhich they are especially adapted to be operated.

Having thus fully described my invention,

I claim and desire to secure by Letters Patent of the United States- Incombination with a smoke or exit pipe of a stove, furnace or heater, ofa draft-regulating device forming a part thereof, the same comprising athimble, a spindle within said thimble, and a pipe-damper arranged toturn in the thimble u on the same, a weighted arm on said spind eoutside of said thimble so disposed as to hold the damper normallyclosed, said thimble having a cold-air inlet leading into the passage ofthe thimble beyond said pipe-damper, a swinging dam er or slide pivotedto the wall of said thim le for controlling the cold-air inlet, a linkconnecting said weighted arm with said swinging damper or slide, wherebywith said pipedamper closed, the swinging damper may be held open, andvice versa, and means comprising a pulley or sector-piece attached tosaid swinging damper to provide for operation of the same.

GEORGE H. TARLETON. In presence of M. V. FOLEY, J. E. R. HAYES.

